Delivery notes can be copied one at a time or more at once.
In order to copy a single delivery note, click on the Copy option in the menu. 
When the delivery note is copied, date of the new delivery note is set to current date. Data that is copied from the original delivery note:
- Basic information - partner, category, and department.
- Delivery note items - items and quantities are copied.
Link to the copied document is visible at the bottom of the delivery note Details/Edit page.
Bulk copy option
To copy more than one document at a time you can use Copy option from the bulk options menu. 
Select  the delivery notes to copy, and then click on the [COPY] button.